Should [Obama] appoint someone who by historical standards is a full-throated liberal, a lion like Justice William J. Brennan, Jr., or Justice Thurgood Marshall? Or should he follow the lead of President Bill Clinton, whose two appointees, Justice Ginsburg and Justice Stephen G. Breyer, are by those standards relative moderates?

The Landes-Posner piece referenced in the article, Rational Judicial Behavior: A Statistical Study, is here.